Buffing wheel



c. J. PETERSON ETAL BUFFING WHEEL Filed Ma 2, 1940 Sheets-Sheet 2 INVENTORS Clarence lib/term Arthurlfl'ttera'm. BY

ATTORNEY Patented Dec. 24, 1940 BUFFING WHEEL Clarence J. Peterson and Arthur H. Peterson,

. Meriden, Conn.

7 Application May 2, 1940, Serial No. 333,002

10 Claims.

This invention relates to improvements in bufiing wheels and more particularly to improved means for supporting and centralizing a thin flexible bufling wheel upon a driving shaft.

A further object of this invention is to provide a buffing wheel of the above nature which will be relatively inexpensive to manufacture, simple in construction, compact, ornamental in appearance, and very eflicient and durable in use.

With these and other objects in view, which will appear as the description proceeds, there have been illustrated in the accompanying drawings, three forms in which the invention may be conveniently embodied in practice.

In the drawings:

Figure 1 is a face view of a bufiing wheel having a cardboard centralizing disc installed therein.

Figure 2 is a face view of the reverse side of the same.

Figure 3 is a sectional view of the same taken on the line 33 of Figure 1.

Figure 4 is a development view of the flat stiff paper blank from which the lining socket for the centralizing disc is bent up.

Figure 5 is an end view of the cardboard disc itself. I

Figure 6 is a face view of a flexible bufiing wheel, having a modified form of centralizing means comprising a. pair of opposed large metal plates each having a small block attached thereto and fitted into the central aperture of the bufl'ing wheel.

Figure 7 is a face view of the same, with one of the metal plates and blocks removed.

Figure 8 is a sectional view of the same taken on the line 88 of Figure 6.

Figure 9 is a side view of the fabric bufling wheel shown in Figure 6 with both of the supporting and centralizing units removed.

Figure 10 is a face view of. one of the metal supporting plates shown by itself.

Figure 11 is an enlarged broken sectional view of the same taken on the line I II I of Figure 10.

Figure 12 is a face view of a bufling wheel having another modified form of centralizing means-in this instance comprising a pair of circular cardboard blocks and a plurality of stiff fiber discs assembled thereto and to the buffing wheel by stitching.

Figure 13 is a sectional view taken on the line I3I3 of Figure 12.

Figure 14 is an exploded view of the same showing the various parts thereof in separated position prior to assembly.

Figure 15 is a side view of one of the outer protecting fiber discs employed in the form shown in Figures 12 to 14 inclusive.

Referring now to the drawings wherein like reference numerals designate like parts throughout the several views, in the first form of buffing wheel shown in Figures 1-5 inclusive, the numeral I denotes a thin flexible buffing cylinder composed of a plurality of superimposed layers of fabric, having a central circular aperture II, relatively large in diameter. A slitted flat strip I 2 preferably of stiff paper, or thin fibre as shown in Figure 4 is wrapped about the internal surface I3 of the aperture II and has on one edge thereof a series of tongues I4 separated by slits I5, said tongues I4 being folded radially outward over one side surface of the cylinder Ill. The tongues I4 and the layers of fabric of the flexible bufiing cylinder III are secured together by two rows of circular stitches I6 and I1. A small circular block I8, of cardboard, or like material, having a central driving shaft-receiving hole I9, is forced into a liner or socket formed by the paper strip I2 and the tongues 20, separated by the slits 2I along the other edge of the strip I2 which tongues 20 are folded radially inward over the other side surface of the bufling cylinder I8. The tongues 28 and the cardboard disc l8 are secured together by two rows of stitching 22 and 23. Preferably the slits I and 2|,

' which are on opposite edges of the strip I2 are staggered with respect to each other, the inner ends of said slits being spaced apart transversely an amount substantially equal to the thickness of the block I8.

Second form Referring now to the second form shown in Figures 6-11 inclusive, the bufling cylinder 30, composed of a plurality of superimposed layers of fabric, or like material, has a circular aperture 3| (see Figure 9), of relatively large diameter. The aperture 3| hasa lining of stiff paper or thin fibre 32 in the form of a slitted-edge strip which is wrapped about the interior surface of the aperture 3Itongues 33 and 34 formed between its slitted edges 35 and 36 being folded radially outward over both opposite sides of'the wheel 30. The tongues 33 and 34 and the layers of fabric forming the wheel 38 are secured together by two concentric rows of stitches 31 and 38.

The centralizing means of the second form of the invention comprises a pair of opposed small circular blocks 39, preferably of flbre or metal, to which are secured a pair of larger circular metal protecting plates 40 adapted to lie outside the bufllng cylinder 30. The blocks 39 are fltted snugly within the lined aperture 3| and are arranged in a face-to-face relation therein. The circular metallic plates 40 are each concentrically secured to one of the blocks 39 by a plurality of circularly spaced-apart hollow rivets 4|.

In order to increase the frictional grip against the side surfaces of the wheel 30, the plates 40 are provided with corrugations 42 extending from the periphery of said plates 48 radially inward and terminating substantially at the circumference of the small blocks 39. Each block 39 is provided with a central opening 43 to fit,

snugly upon a driving shaft 44 and it will be understood that a pair of flanges 45 and 46 on said shaft 44 may be clamped against the opposite plates 48 by a nut 41, screwed on a threaded portion 48 of said shaft 44.

Third form Referring now to the third form of the invention shown in Figures 12-14 inclusive, provision is made of a laminated fabric bufling cylinder 50, similar to the cylinders HI and 30 of the first two forms and having a central aperture The centralizing means, in this instance, comprises a pair of circular inner flexible discs 52 and 53, preferably of cloth, a pair of intermediate small cardboard blocks 54 and 55, which blocks are embraced by a pair of flexible discs 55 and 51 also preferably of cloth, and a pair of outer stiif circular protecting plates 58 and 59 preferably of fibre. To assemble this form of the invention, the inner flexible discs 52 and 53 will first be placed in flat condition on both sides of the wheel covering the central opening therein. The blocks 54 and 55 will then be located outside the discs 52 and 53 and will be pressed inwardly, forcing the flexible discs 52 and 53 toward each other and causing them to form a cup-shaped lining for said blocks, as shown in Fig. 13. The flexible discs 58 and 51 will then be disposed outside of the blocks 54 and 55 and the circular outer protecting plates 58 and 59 will be placed thereover. The combined structure will then be stitched together by two concentric rows of stitches 60 and 8 l,the inner row 80 passing through the plates 58 and 59, the flexible discs 55 and 51, the blocks 54 and 55, and the lining discs 52 and 53. The outer row of stitching 5| only passes through the plates 58 and 59, the flexible discs 55 and 51, and the flexible bufling cylinder 50. An aperture 82 passes through the center of the entire assembled wheel and centralizing means for fitting over a drive shaft, not shown. If desired, the outer plates 58 and 59 may be radially corrugated, as shown at 53 in Fig. 15, to insure tight frictional contact with the sides of the wheel 58 and to more eificiently support and stiffen the same.

In all of the three forms of the invention herein disclosed, a laminated flexible bufling wheel is employed having a relatively large central circular opening, a stiff lining for said opening, a central block or blocks to fit into said lining, and an outer rigid plate member or members secured to said block or blocks to stiffen the bufling wheel at a point outside the center opening thereof.

While there have been disclosed in this specification several forms in which the invention may be embodied, it is to be understood that these forms are shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosures, but may be modifled and embodied in various other form without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent, is:

1. In a buffing wheel having a thin laminatedflexible bufllng cylinder provided with a relatively large central aperture, a lining for said aperture, a stiff apertured centralizing block fitted into said lining, and an outer rigid plate member secured to said block to stiifen the central part of said bufling cylinder adjacent the aperture therein;

2. A buiflng wheel constructed in accordance with claim 1, wherein the lining for the aperture in said wheel has a plurality of tongues along one of its edges folded outwardly over one side of said cylinder, a plurality of tongues along its other edge folded inwardly over said block, and means to secure both sets of said tongues to said bufling cylinder and said centralizing block.

3. In a bufllng wheel having a thin laminated flexible bufling cylinder provided with a relatively large central circular aperture, 9. lining for said aperture, a pair of rigid small centralizing blocks fitted into said lining and located in abutting relation to each other.

4. In a bufling wheel having a thin laminated flexible bufling cylinder provided with a relative- 1y large central circular aperture, a lining for said aperture, a pair of rigid small centralizing blocks fitted into said lining and located in abutting relation to each other, said blocks having small central openings to flt upon a driving spindle.

5. A buiiing wheel constructed in accordance with claim 3 wherein each of said centralizing blocks has a relatively large metallic plate riveted thereto and adapted to support the adjacent side surface of said bufllng cylinder.

6. A buffingwheel constructed in accordance with claim 3 wherein each of said centralizing blocks has a relatively large metallic circular plate riveted thereto and adapted to support the adjacent side surface of said bufllng cylinder.

'7. In a buffing wheel of the character described, having a thin flexible bufling cylinder provided with a central aperture, a flexible lining for said aperture comprising a pair of initially flat circular discs of flexible material pressed into said aperture from opposite sides thereof, a pair of abutting circular rigid blocks seated in said lining, and a pair of outer stiif circular plates to support the inner portion of said flexible cylinder from collapsing during butting.

8. In a bufling wheel of the character described having a thin flexible bufllng cylinder provided with a central aperture, a flexible lining for said aperture comprising a pair of initially flat circular discs of flexible material pressed into said aperture from opposite sides thereof, a pair of abutting circular rigid blocks seated in said lining, and a pair of outer stiff circular plates to support the inner portion of said flexible cylinder from collapsing during buffing, said lining and each of said blocks having a small central opening adapted to flt upon a driving spindle.

9. In a bufllng wheel having a thin laminated flexible bumng cylinder provided with a relatively large central aperture, a lining for said aperture, a stifl apertured centralizing block fitted into said lining, an outer rigid plate member secured to said block to stiflen the central part of said bufiing cylinder adjacent the aperture therein, and means to clamp said block upon the driving spindle passing concentrically therethrough.

10. A bufling wheel constructed in accordance with claim 3 wherein each of said centralizing blocks has a relatively large metallic plate secured thereto and adapted to support the adjacent sid surface of said bufling cylinder.

CLARENCE J. PETERSON. ARTHUR H. PETERSON. 

